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At least 163 records · Page 9Linked to original sources
PubMed1992

Choosing a computer system.

If you can set aside the intense marketing and the appealing gadgetry that surround computer systems, you will still be left with a complex and challenging set of choices. Investigate the hardware and software carefully, certainly, but pay especially close attention to the quality of the people involved, from the consultants to the vendors. Be as skeptical and cautious as any good customer, and make your decisions as though the future of your practice depended on it.

Microcomputers↗
PubMed1977

A computer system for on-line decoding of ultrasonic Doppler signals from blood flow measurement.

This work describes a computer system which may be used for analyzing Doppler signals obtained when measuring the blood velocity. The computer operates on-line, and the velocity components in the blood vessel are obtainedin real-time. The mean velocity and the relative velocity distribution is calculated from the velocity spectrum. Measurements taken from a femoral artery are shown.

Blood Flow Velocity↗
PubMedDate not supplied

A computer system applying the face method to represent multiphasic tests.

The results of medical examinations have recently become multiphasic with few exceptions, and various graphical methods exist to represent the results concisely. One of these graphical methods is reported here, utilizing a computer system for applying the so-called 'face method'. This displays the condition of an individual's health by erythrocyte count, leucocyte count, haemoglobin, erythrocyte sedimentation rate, systolic blood pressure and diastolic blood pressure, all the information being accessible via a database system. Only keywords are necessary to display faces representing the health condition. Graphical methods are useful for providing data features because they appeal to the eye. The face method is more practical than other graphical methods in that its features give easily recognizable indications. The face method can be utilized in various ways, for example in differential diagnosis of anaemia, and to comprehend time-based changes in an individual's health condition based on multiphasic tests.

Biometry↗
PubMed1982

[Questions of accuracy when using "not therapy-specific" computer systems for irradiation planning (author's transl)].

The conditions were examined under which little and medium computer systems not having been primarily developed for radiotherapy can be used in order to make sufficiently precise calculations of dose distributions. The adapted accuracy of the principal factors influencing the dose distribution renders possible a time-saving calculation of several dose distributions and a final calculation. By comparison with a reference calculation made as accurately as possible, the isodose curve shows only little deviations. The following factors were examined in order to find out an eventual influence exerted upon an isodose displacement: number of scan points in the cross-section, correction of the oblique ray incidence, inhomogeneities, dissociations of the rotation field. To our opinion, the isodose displacements found for a dose calculation with adapted accuracy are acceptable when related to influencing factors depending on the individual patients.

Computers↗
PubMed1985

Application of gas chromatograph-mass spectrometer-computer system to evaluation of 14C-labelled compounds.

Usefulness of gas chromatograph-mass spectrometer-computer system (GC-MS-CPU) not only for measurement of specific activities of 14C-labelled compounds in a mixture but also for evaluation of 14C-labelled compounds in terms of examining their purities and elucidating chemical structures of the impurities was proved. A sample of methyl 2-(p-chlorophenyl-14Cn)-3-methylbutylate (III) synthesized from p-chlorophenyl-14Cn-acetonitrile (VI) was analyzed by GC-MS-CPU, and it was found that the labelled compound was contaminated with a small amount of the corresponding m-isomer (IV) having a very high specific activity. Further examination suggested that the contaminating m-isomer (IV) originated from m-chlorophenyl-14Cn-acetonitrile (IX) which had already contaminated in the starting material (VI), and also that cyanomethylation of p-dichlorobenzene-14Cn (VIII) by benzene-type reaction resulted in producing a mixture of p- and m-chlorophenyl-14Cn-acetonitriles (VI, IX).

Carbon Radioisotopes↗
PubMed1977

A versatile computing system for sampling, manipulation and display of biological signals using high-level language.

A medium sized minicomputer system is presented as an attractive way of balancing the cost of computing equipment with that of programme development. A versatile circuit has been coupled to a computer system and programmes have been developed to control the functions of this circuit. With such a system it is possible for relatively untrained biological workers to use FORTRAN programming language to control sampling of analogue signals, manipulation of data and finally graphical presentation of results. The system is proposed for use both in anaesthetic research and in on-line monitoring of critically ill patients.

Analog-Digital Conversion↗
PubMed1978

Application and evaluation of limited mass monitoring with a gas chromatograph mass spectrometer computer system.

The technique of scanning a preselected set of ions employing a combined gas chromatography mass spectrometer computer system has been investigated to ascertain the advantages and disadvantages of such a procedure. This technique allows one to determine gas chromatographic retention data with with a high degree of precision and accuracy, in rapid temperature programming operation, due to shortening of the mas spectral scanning interval. Signal-to-noise ratio in ion abundance recordings can be enhanced by increasing the dwell time for as many as 100 ions without lenghtening the scanning interval. The utility of such an approach was demonstrated by analysis of complex mixtures isolated form human urine and cerebrospinal fluid.

Carboxylic Acids↗
PubMed1977

A modular computer system for the nuclear medicine/ultrasound laboratory.

Computer-controlled graphic displays are a necessity in many nuclear medicine studies. The authors propose using a set-up consisting of three modules: (a) a display system based on television technology; (b) an instrument interface employing list mode and having a low information loss rate; and (c) flexible modular software which can easily be tailored to the needs of both radiologists and technicians. The authors consider a mini-computer system with broad, flexible applications to be a valuable tool, particularly for those function studies which can only be done by means of nuclear medicine techniques.

Computers↗
PubMed1977

A hybrid computer system for use in cardiology.

Recent upsurge in the use of physiologic data for medical diagnostic and treatment procedures has prompted the medical profession to use the computer to automate and reduce the time required for data processing. Although the digital computer has traditionally been used to perform these tasks, a hybrid computer (combined analog and digital) has been found to provide many advantages over the digital computer, especially where on-line data processing is concerned. As a result, the Bio-Medical Engineering Center has installed a centrally located hybrid computer system at Ohio State University. One of the applications of this system has been processing cardiac catheterization data. Data is transmitted between the hospital and computer via infrared optics. The data can be analyzed in real time, with the results immediately available to the physician.

Cardiac Catheterization↗
PubMed1985

A method for measuring specific activities of 14C-labelled compounds by gas chromatography-mass spectrometry-computer system.

A method for measuring specific activities of 14C-labelled compounds by gas chromatography-mass spectrometry-computer system (GC-MS-CPU) was developed. This method was proved to provide practically precise and accurate specific activities of various 14C-labelled compounds with such merits as requirement of small amount of samples, being applicable to volatile compounds, and convenience. The C.V. percent obtained for tested compounds was within 3.9 and the reliable sensitivity should be over 37 MBq/mM (1 mCi/mM). This method was also useful for obtaining information on the labelling pattern and the synthetic procedures applied.

Carbon Radioisotopes↗
PubMed1986

Improved programs for DNA and protein sequence analysis on the IBM personal computer and other standard computer systems.

We have previously described programs for a variety of types of sequence analysis (1-4). These programs have now been integrated into a single package. They are written in the standard C programming language and run on virtually any computer system with a C compiler, such as the IBM/PC and other computers running under the MS/DOS and UNIX operating systems. The programs are widely distributed and may be obtained from the authors as described below.

Amino Acid Sequence↗
PubMed1992

Whole words and decoding for short-term learning: comparisons on a "talking-computer" system.

Low-and average-ability readers in first and second grade studied a list of 36 words using a "talking-computer" system. The system highlighted and simultaneously pronounced orthographic units in the words when the children touched the words with a light pen. During two training sessions, the computer presented four groups of 9 words each, one group as whole words, one in syllabic units, one in subsyllabic units, and one as single grapheme-phoneme units. All children learned the least words with single grapheme-phoneme units, having had the greatest difficulty blending the units into words during training. The other presentation units did not differ significantly from each other for most students on post-testing. However, the low first-grade readers learned fewer words segmented and presented by subsyllables than by syllable or word units, but only for multisyllabic words. Monosyllabic words were blended and learned as easily with onset-rime segmentation as with whole word units, for all children.

Achievement↗